Search Publications
Missions
Journals
Publication Years
LCROSS (Lunar Crater Observation and Sensing Satellite) Observation Campaign: Strategies, Implementation, and Lessons Learned
Terada, Hiroshi; de Pater, Imke; Vilas, Faith +84 more
NASA's LCROSS (Lunar Crater Observation and Sensing Satellite) mission was designed to explore the nature of previously detected enhanced levels of hydrogen near the lunar poles. The LCROSS mission impacted the spent upper stage of the launch vehicle into a permanently shadowed region of the lunar surface to create an ejecta plume. The resultant i…
High resolution IR observations of the starburst ring in NGC 7552. One ring to rule them all?
Schaerer, D.; Brandl, B. R.; van der Werf, P. P. +2 more
Aims: Approximately 20% of all spiral galaxies display starburst activity in nuclear rings of a few hundred parsecs in diameter. It is our main aim to investigate how the starburst ignites and propagates within the ring, leading to the formation of massive stellar clusters.
Methods: We observed the ring galaxy NGC 7552 with the mid-infra…
Spitzer Observations of the HH 1/2 System: The Discovery of the Counterjet
Raga, A. C.; Noriega-Crespo, A.
We present unpublished Spitzer IRAC observations of the HH 1/2 young stellar outflow processed with a high angular resolution deconvolution algorithm that produces subarcsecond (~0farcs6-0farcs8) images. In the resulting mid-infrared images, the optically invisible counterjet is detected for the first time. The counterjet is approximately half as …
Turbulence in a global magnetohydrodynamic simulation of the Earth's magnetosphere during northward and southward interplanetary magnetic field
Richard, R. L.; El-Alaoui, M.; Walker, R. J. +2 more
We report the results of MHD simulations of Earth's magnetosphere for idealized steady solar wind plasma and interplanetary magnetic field (IMF) conditions. The simulations feature purely northward and southward magnetic fields and were designed to study turbulence in the magnetotail plasma sheet. We found that the power spectral densities (PSDs) …
A deep, wide-field study of Holmberg II with Suprime-Cam: evidence for ram pressure stripping
Jablonka, Pascale; Arimoto, Nobuo; Ferguson, Annette M. N. +3 more
We present a deep, wide-field optical study of the M81 group dwarf galaxy Holmberg II (HoII) based on Subaru/Suprime-Cam imaging. Individual stars are resolved down to I ∼ 25.2, that is, about 1.5 mag below the tip of the red giant branch (RGB). We use resolved star counts in the outskirts of the galaxy to measure the radial surface brightness pro…
Discovery of Bright Galactic R Coronae Borealis and DY Persei Variables: Rare Gems Mined from ACVS
Cenko, S. B.; Bloom, J. S.; Stassun, K. G. +4 more
We present the results of a machine-learning (ML)-based search for new R Coronae Borealis (RCB) stars and DY Persei-like stars (DYPers) in the Galaxy using cataloged light curves from the All-Sky Automated Survey (ASAS) Catalog of Variable Stars (ACVS). RCB stars—a rare class of hydrogen-deficient carbon-rich supergiants—are of great interest owin…
Solar-Storm/Lunar Atmosphere Model (SSLAM): An overview of the effort and description of the driving storm environment
Delory, G. T.; Halekas, J. S.; Farrell, W. M. +9 more
On 29 April 1998, a coronal mass ejection (CME) was emitted from the Sun that had a significant impact at Earth. The terrestrial magnetosphere became more electrically active during the storm passage. Less explored is the effect of such a storm on an exposed rocky body like our Moon. The solar-storm/lunar atmosphere modeling effort (SSLAM) brings …
Star-galaxy separation in the AKARI NEP deep field
Pearson, C. P.; Ohyama, Y.; Takagi, T. +10 more
Context. It is crucial to develop a method for classifying objects detected in deep surveys at infrared wavelengths. We specifically need a method to separate galaxies from stars using only the infrared information to study the properties of galaxies, e.g., to estimate the angular correlation function, without introducing any additional bias.
…
Magnetic field measurements during the ROSETTA flyby at asteroid (21)Lutetia
Richter, I.; Glassmeier, K. H.; Carr, C. M. +5 more
On July 10, 2010, the ROSETTA spacecraft performed a flyby at asteroid (21)Lutetia at a solar distance of 2.72 AU. The spacecraft-asteroid distance at closest approach was 3120 km. The magnetometers onboard ROSETTA were operating but did not detect any conclusive signature of the asteroid. Any magnetic field signature which could possibly be attri…
AKARI Observation of the North Ecliptic Pole (NEP) Supercluster at z = 0.087: Mid-infrared View of Transition Galaxies
Kim, Seong Jin; Papovich, Casey; Weiner, Benjamin J. +12 more
We present the mid-infrared (MIR) properties of galaxies within a supercluster in the north ecliptic pole region at z ~ 0.087 observed with the AKARI satellite. We use data from the AKARI NEP-Wide (5.4 deg2) IR survey and the CLusters of galaxies EVoLution studies (CLEVL) mission program. We show that near-IR (3 µm)-mid-IR (11 &mi…